If there are no fauna in the tank then it is ok to crank the co2. Just be sure to match it with adequate nutrients for the plants.

That's what I was thinking--thanks! I'm using EI dosing, so hopefully that's enough, especially since my lighting isn't all that high.

Quote:

Originally Posted by tetra10

...did you put the foam pad in front of the biomax? if not you should.

Thanks for the suggestion, I should check how I have it set up. I think I did foam in the bottom tray and biomax in the top but I don't remember which way the water flow is going.

My regret with this hardscape is the lack of strong substrate slopes. When I look at tanks like Kiran's the contour adds a lot of interest to the layout. Good learning experience anyway, I have trouble learning things without doing them wrong first.